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[Solved] clearSelection() not surviving postback

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ListBox

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Andrew Dixon asked on 30 Aug 2011, 02:36 AM

Hi,

I have a RadListbox (single select mode) and a button which deselects all items in the RadListbox using clearSelection() in javascript. This appears to work, until there is a postback at which point the item is selected again.

Here is some example code which exhibits this problem (p_Postback_Click is just an empty event handler to cause a postback):

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TestClearSelection.aspx.cs" Inherits="TestClearSelection" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title></title>

</head>

<body>

<form id="form1" runat="server">

<script type="text/javascript">

function ClearListbox() {

lb = $find("RadListBox1");

lb.clearSelection();

}

</script>

<ajax:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true"></ajax:ScriptManager>

<div>

<telerik:RadListBox ID="RadListBox1" runat="server">

<Items>

<telerik:RadListBoxItem Text="Item 1" />

<telerik:RadListBoxItem Text="Item 2" />

<telerik:RadListBoxItem Text="Item 3" />

</Items>

</telerik:RadListBox>

<asp:Button ID="b_ClearSelection" runat="server" Text="Clear Selection" onclientclick="ClearListbox(); return false;" />

<asp:Button ID="b_PostBack" runat="server" Text="Postback"

onclick="b_PostBack_Click" />

</div>

</form>

</body>

</html>

Is this a bug, or am I just missing something else that I need to do? I've seen trackChanges and commitChanges in the documentation but these seem to be needed only when adding or deleting ListItems clientside.

Thanks
Andy

[Solved] clearSelection() not surviving postback

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